Vehicle Wiring Details for a
1990 Geo Prizm
Item Wire Color Polarity Wire Location
12V white or black/red Positive (+) ignition harness
Starter black/white Positive (+) ignition harness
Starter 2 none
Ignition black/yellow Positive (+) ignition harness
2nd Ignition black/orange Positive (+) ignition harness
3rd Ignition none
Accessory blue/red Positive (+) ignition harness
Accessory 2 none
Tachometer black igniter or fusebox
Power Door (Lock)
Wiring Diagram for
[Negative (-)] Door Lock
blue/white Negative (-) driver's kick panel
Power Door (Unlock)
Wiring Diagram for
[Negative (-)] Door Unlock
blue/yellow Negative (-) driver's kick panel
Door Trigger red/white [1] Negative (-) dr. kick or theft mod.
Dome Supervision
Wiring Diagram for
[none] Dome
none none none
Headlights red/white [2] Negative (-) steering column
Parklight Positive dk. green Positive (+) driver's kick panel
Parklight Negative lt.grn or lt.grn/blk Negative (-) steering column
Wipers blue/black Positive (+) steering column
Left Front Window
grn or rd,yel or grn driver's door switch
Right Front Window
green/red, blue/wht dr. door or kick panel
Left Rear Window
red/grn, blue/black same
Right Rear Window
red/black, yellow same (rest at ground)
Trunk/Hatch Pin red/white [3] Negative (-) light or sw. in trunk
Hood Pin red Negative (-) anti-theft mod. or pin
Trunk/Hatch Release
Wiring Diagram for
[] Trunk/Hatch
Factory Alarm
white or blue/yellow Negative (-) dr. kick or theft mod.
Factory Alarm
wht/grn or blue/wht Negative (-) same
Horn green/red Negative (-) steering column
Brake green/white Positive (+) brake pedal switch
Door Motor
none none none
Door Motor
none none none
Disarm none none none
Disarm No Unlock none none none
Additional Info:
[1] Anti-theft module 18 pin plug pass. kick panel [2] Also ground red/green for cars with retractable headlights. [3] Wagons common with doors. Also at anti-theft module at pass. kick panel.

ATTENTION: This wiring information is being provided free of charge and on an "as is" basis, without any representation or warranty. It is your responsibility to verify any circuit before interfacing with it by using a digital multimeter. GNU Industries, Inc. assumes no responsibility with regards to the accuracy or currency of this information. Proper installation in every case is and remains the responsibility of the installer. GNU assumes no responsibility resulting from an improper installation, even in reliance upon this information.

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